Comparison of tire sizes 315/35 R20 and 315/30 R20
315/35R20
315
Tire width 
35
Profile height 
R20
Tire diameter 
437
RPM per km 315mm110mm729mm2289mm
315
35
20
315
30
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 729 | 697 | -32 (-4.4%) | ||
| Width, mm | 315 | 315 | 0 (0%) | ||
| Circumference, mm | 2289 | 2190 | -99 (-4.3%) | ||
| Profile height, mm | 110 | 95 | -15 (-13.6%) | ||
| RPM per km | 437 | 457 | +20 (+4.6%) | ||
| Clearance change, mm | -16 | ||||
| Result: | The diameter differs by -4.4%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 95.7 |
| Difference (km/h) | -4.3 |
Sizes for comparison of tires 315/35 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
Sizes for comparison of tires 315/30 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
